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Old 04-05-2010, 05:20 AM
Rangerdoc Rangerdoc is offline
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Default Auto dimming mirror

Just installed a new autodimming rear view mirror. I tapped into the radio power line at the fuse box. Mirror works fine but two days later and my battery is dead. Does anyone know is there always some drain on the radio power line or does it shut off completely when the ingnition is off? What circuit can I use as an alternative. Thanks Dave
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Old 04-05-2010, 05:31 AM
Jp7 Jp7 is offline
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Default Re: Auto dimming mirror

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Originally Posted by Rangerdoc View Post
Just installed a new autodimming rear view mirror. I tapped into the radio power line at the fuse box. Mirror works fine but two days later and my battery is dead. Does anyone know is there always some drain on the radio power line or does it shut off completely when the ingnition is off? What circuit can I use as an alternative. Thanks Dave
The problem is that you used a wire that is hot at all times. Try a wire that is only hot with the key on. PCM power should work.
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Old 04-05-2010, 05:32 AM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: Auto dimming mirror

did you wire it into the radio constant power or the ACC power?
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Old 04-05-2010, 06:16 AM
Rangerdoc Rangerdoc is offline
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Default Re: Auto dimming mirror

What does PCM stand for?
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Old 04-05-2010, 07:18 AM
STL STL is offline
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Default Re: Auto dimming mirror

Powertrain control module

Use a 12v switched power source
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Old 04-05-2010, 08:18 AM
Tom Tom is offline
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Default Re: Auto dimming mirror

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What does PCM stand for?
As STL said, it stands for Powertrain control module. In the future, just hover your mouse over acronyms like PCM and it will tell you what it stands for.
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Old 04-05-2010, 08:26 AM
Rangerdoc Rangerdoc is offline
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Default Re: Auto dimming mirror

Thanks guys I'll try changing the power lead for the mirror tonight!
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